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1 340 825 documents amended

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EP 0292464 B1 19920805 - THREADED CONNECTOR FOR A DRILL PIPE

Title (en)

THREADED CONNECTOR FOR A DRILL PIPE

Publication

EP 0292464 B1 19920805 (FR)

Application

EP 88870086 A 19880511

Priority

BE 8700512 A 19870512
BE 8700513 A 19870512

Abstract (en)

[origin: EP0292464A1] The performances of a threaded joint for the screw connection of rod elements with frustoconical threads are at least doubled in relation to threads conforming to present standards when the opening angle ( alpha ) of the cone and the angle of inclination of the helix ( beta ) at the start of the thread are selected in such a way that their ratio is less than 2. <IMAGE>

IPC 1-7

E21B 17/042; F16L 15/00

IPC 8 full level

F16L 15/06 (2006.01); E21B 17/042 (2006.01)

CPC (source: EP)

E21B 17/042 (2013.01); F16L 15/06 (2013.01)

Designated contracting state (EPC)

DE FR GB IT NL

DOCDB simple family (publication)

EP 0292464 A1 19881123; EP 0292464 B1 19920805; DE 3873414 D1 19920910; DE 3873414 T2 19930204; NO 177545 B 19950626; NO 177545 C 19951004; NO 882053 D0 19880511; NO 882053 L 19881114

DOCDB simple family (application)

EP 88870086 A 19880511; DE 3873414 T 19880511; NO 882053 A 19880511